vim/backport-CVE-2022-2845.patch
2022-11-03 15:22:25 +08:00

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From e98c88c44c308edaea5994b8ad4363e65030968c Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Tue, 16 Aug 2022 14:51:53 +0100
Subject: [PATCH] patch 9.0.0218: reading before the start of the line
Problem: Reading before the start of the line.
Solution: When displaying "$" check the column is not negative.
---
src/edit.c | 3 ++-
src/proto/edit.pro | 2 +-
src/testdir/test_cmdline.vim | 8 ++++++++
3 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/src/edit.c b/src/edit.c
index a8e695c..96f47bd 100644
--- a/src/edit.c
+++ b/src/edit.c
@@ -1741,8 +1741,9 @@ edit_unputchar(void)
* Only works when cursor is in the line that changes.
*/
void
-display_dollar(colnr_T col)
+display_dollar(colnr_T col_arg)
{
+ colnr_T col = col_arg < 0 ? 0 : col_arg;
colnr_T save_col;
if (!redrawing())
diff --git a/src/proto/edit.pro b/src/proto/edit.pro
index a233e40..f35ec1e 100644
--- a/src/proto/edit.pro
+++ b/src/proto/edit.pro
@@ -5,7 +5,7 @@ void ins_redraw(int ready);
void edit_putchar(int c, int highlight);
void set_insstart(linenr_T lnum, int col);
void edit_unputchar(void);
-void display_dollar(colnr_T col);
+void display_dollar(colnr_T col_arg);
void undisplay_dollar(void);
void truncate_spaces(char_u *line);
void backspace_until_column(int col);
diff --git a/src/testdir/test_cmdline.vim b/src/testdir/test_cmdline.vim
index f0498a1..08e2de7 100644
--- a/src/testdir/test_cmdline.vim
+++ b/src/testdir/test_cmdline.vim
@@ -3439,4 +3439,12 @@ func Test_long_error_message()
silent! norm Q00000000000000     000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000                                                                                                                                                                                                                        
endfunc
+func Test_cmdwin_virtual_edit()
+ enew!
+ set ve=all cpo+=$
+ silent normal q/s
+
+ set ve= cpo-=$
+endfunc
+
" vim: shiftwidth=2 sts=2 expandtab
--
2.36.1